package day03;

public class OperDemo5 {
    public static void main(String[] args) {
        int age = 40;
        System.out.print("age=");
        System.out.println(age);
        System.out.println("age="+age);
        System.out.println("我今年"+age+"岁了");

        String name = "WKJ";
        System.out.println("大家好,我叫"+name);
        System.out.println("大家好,我叫"+name+",今年"+age+"岁了");

        System.out.println(10+20+""+30);
        System.out.println(""+10+20+30);
        System.out.println(10+20+30+"");



















    }
}
